Pumps are pieces of equipment or machinery designed to move slurries, liquids or gases. There are a lot of different types of pumps available and different pumps work in different ways. Our double diaphragm pump is reciprocating type, driven by air. Diaphragm pumps are categorized under the most common types of industrial pumps. It makes use of the so-called positive displacement method in order to move a liquid from one location to another. The diaphragm pump can be used as drum pump, put the suction pipe into a drum or barrel. The operation is easy. The air diaphragm pump has the function of self priming without rotating parts. It can achieve dry priming and wet priming, which self-priming height is 5m and 8m respectively. Below is a schematic diagram of the installation of the pump.                     If you are in need of this high viscosity diaphragm pump, pls contact with Ms Cindy(sales9@defupump.com) freely. We will in...

DEFU Powder Pumps were specifically designed to move bulk solids more effectively throughout your process. They are a cost effective replacement for Augers and Conveyors and eliminate unsafe and labor intensive means of moving bulk powders. These Powder pumps consistently transfer fine-grained (less than 75 microns), low bulk density (less than 880 kg/m³), dry powders in a dust-free operation. Pneumatic powder transfer pump features DEFU's pneumatic powder conveying systems deliver and handle dry-process powders quickly and cleanly， at a fraction of the cost of associated conventional installed "systems". Application It is suitable for conveying ultra-fine, light and dry powders. It is required that the particle size of the powder is less than 75 microns, the bulk density is less than 880 kg/m³, and the powder is dry and has good fluidity. Parameter Description The fluidity, particle size and dispersibility of powders vary greatly. The capacity and delivery head&nbs...

DEFU is a professional diaphragm pump supplier in China. An Air Operated Double Diaphragm Pump is a Positive Displacement Pump. Diaphragm pumps are categorized under the most common types of industrial pumps. It makes use of the so-called positive displacement method in order to move a liquid from one location to another. A diaphragm pump is capable of handling highly-viscous liquids and other materials such as abrasives, chemicals, concrete, effluents. What’s more, Double diaphragm pump is driven by air, it’s pneumatic motor. they could be used in potentially explosive areas. So it’s can transfer gasoline or diesel fuel. we also call it as oil pump and drum pump. Below are our air driven diaphragm oil pumps with different specification. Pump body material is Aluminum, Diaphragm is Teflon.                                                   &...

Diaphragm Self Priming Pump are a common site in many industries. The stainless steel diaphragm pumps an excellent choice for food industry and high chemical resistance liquids. There are stainless steel 304&316. We adopt precision casting, the surface is smooth and higher strength.   Stainless steel 304 /316 diaphragm pump size from 1/2" to 3", the Max. Flow rate is 1060L/min. Pump can supply with aluminum center block or PP center block. Dry running ability: Pumps can be‘Run Dry’ without damaging the internals of the pump. Self-priming: AODD Pumps are self-priming–Dry suction lifts of 4m and wet suction lifts of 8m are common. Four bolts connection design, good seal and good dry suction. The bolts material are SS304。   Also we have Quickly Coupling for optional.     Any needs, pls feel free to contact with Cindy(sales9@defupump.com). We gladly provide technical assistance to you. 

The DEFU AODD diaphragm pumps are an excellent choice for applications found in a variety of industries, such as food, chemical, and general industry. Their unique design allows them to transfer highly abrasive or viscous products, semi-solid, and shear sensitive materials. They're best known for ease of maintenance and replacement, self-priming ability, seal-less design, and their ability to "run dry" without causing damage to the pump.   What else makes the air diaphragm pump so versatile? They're manufactured in a variety of pump materials, including cast iron, stainless steel(304&316), Aluminum alloys, and various diaphragm and valve making them ideal for just about any market. Membrane Pump Best Applications Below is a short list of the best applications for this pump: 1.Chemical or hazardous liquid transfer 2.Abrasive or viscous product transfer 3.Portable spill clean-up applications 4.Explosion-proof environments if properly grounded Below is our diaphragm pum...

The pneumatic double diaphragm pump is a versatile workhorse that enables users across a hugely diverse range of industries to standardise on a single pump type that for handling a wide variety of fluids. So long as there is a compressed air supply available the pump can be installed wherever it is required and should circumstances change it can be moved round a plant and switched to other operations with ease. Whether to fluid being handled requires a gentle pumping action, is chemically or physically aggressive the positive displacement AODD pump offers an efficient and low maintenance solution. The air membrane pumps are a common site in many industries. There is an extensive number of construction materials available to produce a bewildering number of configurations to accommodate difficult fluids such as  1.Corrosive chemical 2.Volatile solvents  3.Viscous, sticky fluids 4.Shear-sensitive foodstuffs and Pharmaceutical product 5.Dirty water and abrasive slu...

A double diaphragm(AODD Pump) is a positive displacement pump which utilises two flexible diaphragms that reciprocate back and forth, creating a temporary chamber. The flexible diaphragms both draws in and expels fluid through the pump. The diaphragms work as a separation wall between the air and the liquid. The first stroke The two diaphragms that are connected by a shaft through the centre section where the air valve is located. The purpose of the air valve is to direct the compressed air to the back of diaphragm number one causing it to move away from the centre section. The number one diaphragm causes a press stroke moving liquid out of the pump. At the same time diaphragm number two is performing a suction stroke. The air behind diaphragm number two is being pushed out to the atmosphere causing atmospheric pressure to push the liquid to the suction side. The suction ball valve is pushed away off its seat allowing the fluid to flow past the ball valve into the liquid cham...

Pneumatic diaphragm pumps are used widely in the national economy. A “weak” component of such air operated diaphragm pump is the diaphragm, upon which depends the duration of continuous operation of the pump. The service life of the diaphragm depends on the design and materials of the diaphragm, temperature, and corrosiveness of the pumped medium. Our double diaphragm pump with Longer life time Diaphragm. Material: Hytrel from Dupont, Santoprene from Exxon, PTFE from Dakin and Saint-Gobain etc. Design: Increase the height of the diaphragm's arch portion, ensure to reduce the force to the diaphragm edge portation and avoid the diaphragms been pull out. Center place with O-ring design, enhance seal performance. DEFU Diaphragm Material And Operating Temperature Limitation DEFU is the main and professional diaphragm pump manufacturer in China. Our company have CE and ISO9001 certificate. Any inquiry, pls feel free to contact with Ms Cindy， Ema...

Diaphragm pumps are popular in industrial area , can pump various fluids drastically, whether corrosive, volatile, flammable, poisonous liquid even fluids with particles and high viscosity. They have a long history of use in water and waste water treatment and can also be found in filter press, oil ink, painting and ship building etc. Advantage of DEFU Air Diaphragm Pump Convenient Maintenance Unique Patented Air Valve Parts That Are Precisely Fit Solids External Structure Compatibility of Fluid Good Self Priming Function Can Achieve High Pressure It is of great importance to correctly use materials , such as diaphragm, valve balls, valve seats and pump body both need to the suitable materials base on your pumping liquid.